Table 2.

Mean, standard deviation (SD), and P values for different concentrations of glass fiber, zirconia, and nano-zirconia reinforcement.

	Mean ± SD	Versus HC	Versus AP
HC, control	83.01 ± 3.03	—	—
AP	44.85 ± 3.68	—	—
2GF	56.98 ± 2.58∗∗	0.0001	0.001
5GF	42.75 ± 2.45∗	0.0001	0.175
2ZR	50.07 ± 2.97∗	0.0001	0.064
5ZR	40.21 ± 3.31∗∗	0.0001	0.035
2NZR	65.43 ± 2.62∗∗	0.001	0.0001
5NZR	70.77 ± 2.80∗∗	0.001	0.0001

^∗Statistical significance of the material with control group only at P ≤ 0.05.

^∗∗Statistical significance of the material with control as well as AP at P ≤ 0.05.